Aluminum silicate red phosphor and preparation method thereof
A red phosphor, aluminosilicate technology, applied in chemical instruments and methods, luminescent materials, electrical components, etc., can solve the problems of weak absorption, limited application range, poor stability of fluoride, etc., and achieve strong absorption and high luminescence efficiency. Effect
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[0037] Example 1
[0038] Select strontium carbonate, aluminum hydroxide, silicon dioxide, manganese carbonate and boric acid as starting compound raw materials. According to the molar ratio of each element, weigh five compound raw materials, a total of 8 groups, and the ratio is as follows:
[0039] (1) Sr:Al:Si:Mn:B=3:9.999:1:0.001:0.5, corresponding to x=0.01%, y=5%;
[0040] (2) Sr:Al:Si:Mn:B=3:9.998:1:0.002:0.5, corresponding to x=0.02%, y=5%;
[0041] (3) Sr:Al:Si:Mn:B=3:9.995:1:0.005:0.5, corresponding to x=0.05%, y=5%;
[0042] (4) Sr:Al:Si:Mn:B=3:9.990:1:0.010:0.5, corresponding to x=0.1%, y=5%;
[0043] (5) Sr:Al:Si:Mn:B=3:9.970:1:0.030:0.5, corresponding to x=0.3%, y=5%;
[0044] (6) Sr:Al:Si:Mn:B=3:9.950:1:0.050:0.5, corresponding to x=0.5%, y=5%;
[0045] (7) Sr:Al:Si:Mn:B=3:9.900:1:0.100:0.5, corresponding to x=1.0%, y=5%;
[0046] (8) Sr:Al:Si:Mn:B=3:9.800:1:0.200:0.5, corresponding to x=2.0%, y=5%;
[0047] The total weight of the control mixture is 5 grams. After grinding a...
Example Embodiment
[0053] Example 2
[0054] Select strontium carbonate, aluminum hydroxide, silicon dioxide, manganese carbonate and boric acid as starting compound raw materials, according to the molar ratio of each element Sr:Al:Si:Mn:B=3:9.990:1:0.010:0.5, corresponding to x =0.1%, y=5%; Weigh five compound raw materials respectively, and control the total weight of the mixture to 15 grams. After grinding and mixing 15 grams of the mixture, put it into a corundum crucible, and then put the crucible into a high-temperature electric furnace. The heating rate is precisely controlled, and the sample is pre-burned at 800°C for 5 hours. Take out the pre-burned sample, grind and mix it again and divide it into several parts, and burn it at temperature T (T=1200, 1250, 1300, 1350, 1450, 1500, 1550℃) for 5 hours under air, then take it out and grind it again. After that, burn again at temperature T (T = 1200, 1250, 1300, 1350, 1450, 1500, 1550°C) under air for 5 hours, and cool down naturally in the f...
Example Embodiment
[0055] Example 3
[0056] Select strontium oxide, aluminum hydroxide, silicon dioxide, manganese oxide and boric acid as starting materials, according to the molar ratio of each element Sr:Al:Si:Mn:B=3:9.999:1:0.001:0.2, corresponding to x= 0.01%, y=2%; Weigh five kinds of raw materials, and control the total weight of the mixture to 5 grams. After grinding and mixing 5 grams of the mixture, put it into a corundum crucible, and then put the crucible into a high-temperature electric furnace. The heating rate is precisely controlled, and the sample is pre-burned at 500°C for 10 hours. Take out the pre-burned sample, grind and mix it again, burn it at 1550℃ for 2 hours under oxygen atmosphere, take it out and grind it again, burn it at 1550℃ under oxygen atmosphere for 2 hours, and cool it naturally with the furnace Tetravalent manganese ion doped with strontium aluminosilicate red luminescent material. X-ray diffraction analysis shows that it is Sr 3 Al 10 SiO 20 Crystalline pha...
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